False Ceiling Roll Forming: 4 T-Grid Suspension Profiles 2026

Darren Mao
Novembro 5, 2026

Precisa de uma máquina de conformação de perfis para o seu projeto?

Obtenha um orçamento gratuito da Believe Industry — mais de 15 anos de fabricação de máquinas de conformação sob medida.

Pedir cotação Baixar catálogo

False Ceiling Roll Forming Applications: T-Grid and Suspension Systems

Resposta curta: False ceiling roll forming runs 0.30 to 0.50 mm galvanized strip at 40 to 60 m/min and produces main tees, cross tees, wall angles and furring channels. The roll set is the easy part. What decides whether the grid lies flat is punch accuracy on the cross tee tab and slot pitch on the main tee.

A ceiling grid looks simple until the first module goes up out of square. False ceiling roll forming works at 24 mm face width and 0.35 mm thickness, so every error a heavier profile would absorb shows at the joint.

What False Ceiling Roll Forming Covers

False ceiling roll forming covers four profiles that ship as one system. The main tee carries load, the cross tee closes the module, the wall angle anchors the perimeter, and the furring channel serves the plasterboard and acoustic side of the same job.

Perfil	Face width	Altura da web	Espessura	Comprimento
Main tee	24 mm	38 mm	0.35 to 0.50 mm	3.0 to 3.66 m
Cross tee	24 mm	32 mm	0.30 to 0.40 mm	0.6, 1.2, 1.5 m
Wall angle	23 to 24 mm	23 to 24 mm	0,40 a 0,60 mm	3.0 m
Furring channel	20 to 25 mm	30 to 45 mm	0,40 a 0,60 mm	Cut to order

Main tee and cross tee share a face width because they must sit flush. They do not share a web height, and that 6 mm difference is what lets the cross tee tab drop into the main tee slot and lock without a tool.

The module comes from the market, not the machine. A 600 by 600 mm grid serves most commercial ceilings, 600 by 1200 mm covers corridors, and 500 by 500 mm appears in healthcare and cleanroom work. False ceiling roll forming on any line follows the module the buyer sells.

One Mill, Two Punch Dies

A false ceiling roll forming line builds both tees from the same coil, at the same speed, on the same forming stands. Only the punch die and cut length change.

So on a false ceiling roll forming line the practical question is changeover time, not capability. A die cart with pre-set punch units takes 20 to 40 minutes. A bolted and shimmed die takes half a shift, which no ceiling plant accepts twice a day.

Slots and tabs are separate operations. The main tee needs slot groups at 600 mm centres punched through the web, with a die that clears both flanges. The cross tee needs an end tab formed and punched at each end, a two stage tool because the tab bends up after the hole is cut.

That tab is where quality problems start. A tab 0.3 mm too long will not enter the slot. A tab 0.2 mm too short rattles and reads as a shadow line under lighting. Both come from punch die wear rather than the rolls, which is why spare punch inserts matter more than spare rollers.

The Punch Sets the Module

On a 3.66 m main tee with slots at 600 mm centres there are six slot groups. Their spacing must hold within plus or minus 0.3 mm end to end, or six modules will not close against the next run. In false ceiling roll forming, that number is tighter than the section tolerance, and it is set by the feed system rather than the forming stands.

Característica	Tolerância	Consequence if missed
Slot pitch	plus or minus 0.3 mm	Grid will not close, cross tees bind
Slot to tee end	mais ou menos 0,5 mm	Perimeter gap at wall angle
Tab length	plus or minus 0.15 mm	Loose or jammed joint
Face width	plus or minus 0.10 mm	Visible step between tees
Cut length	mais ou menos 0,5 mm	Uneven border course

Servo feed with a measuring wheel holds those figures. A mechanical stop with a worn dog does not, and the drift only shows when the installer reaches the fifth module. Cross tee length follows the same logic: a 1200 mm tee at 1198.5 mm leaves a 1.5 mm gap in every second module.

O guia de instalação de matriz de puncionamento covers the alignment sequence that keeps these numbers stable after a die change, which is where a good line starts producing bad tee.

Running 0.35 mm Strip at 40 to 60 m/min

False ceiling roll forming is a thin gauge, high speed process. Cross tee lines reach 60 m/min and main tee lines 35 to 50 m/min. At this thickness there is almost no forming load, and the constraint moves to strip handling.

Light strip lifts off the rolls, wrinkles at the flange radius, and moves fast enough that a flying cut must finish in 60 ms.

Item	Cross tee line	Main tee line
Estações de conformação	14 a 18	18 a 24
Velocidade da linha	45 to 60 m/min	35 a 50 m/min
Drive per stand	2.2 to 3.0 kW	3.0 to 4.0 kW
Punch strokes	120 to 180 per min	80 to 120 per min
Cut off	Tesoura voadora	Tesoura voadora
Desbobinador	3 to 5 t	5 to 8 t

Coil arithmetic sets the shift. A 5 t coil of 0.35 mm by 150 mm strip holds roughly 1,150 m, which is 19 minutes at 60 m/min. A double decoiler with a coil car pays back faster here than on almost any other product, and a 60 m accumulator loop lets the mill run through a coil weld without a stop that would mark the strip.

The same logic applies to high speed roof panel lines, where the gauge is also under 0.6 mm.

Steel and Coating for Indoor Ceilings

Ceiling tee starts as hot dip galvanized coil, and the coating class decides whether the ceiling survives a humid building. Indoor dry areas accept Z100. Kitchens, car parks and pool halls need Z180 or a painted finish.

Qualidade	Norma	Escoamento	Revestimento	Usar
DX51D+Z	EN 10346	140 to 240 MPa	Z100 to Z275	Standard tee
S250GD+Z	EN 10346	250 MPa	Z100 to Z275	Stiffer tee
CS Type B	ASTM A653	205 MPa	G40 to G90	US market tee
SS 275	ASTM A653	275 MPa	G60 to G90	Long span main tee

In false ceiling roll forming, thickness follows span, not habit. A 3.66 m main tee at 0.35 mm sags with 15 kg of tile across 1.2 m hanger spacing. At 0.45 mm the same tee holds 1.5 m spacing, which cuts hanger count by a third.

Coating weight changes false ceiling roll forming too. A Z275 surface is harder than Z100 and springs back more at the hem, so heavy coating needs a different overbend.

EN 13964 governs suspended ceiling performance in Europe and the British Standards Institution publishes the test methods behind the load classes. In North America the product standard is ASTM C635, summarised through the Gypsum Association. Cold formed section tolerances are set out by SteelConstruction.info.

Straightness, Twist, and Rejected Bundles

A tee straight on the floor can still twist once hung. In false ceiling roll forming the cause is uneven flange strain, usually a roll gap 0.02 mm different left to right, or coil camber the straightener missed.

The numbers that matter are simple. Straightness within 0.5 mm per metre, twist under 1 degree over full length, and no burr on the visible face. A burr collects dust and shows under grazing light on a white ceiling.

Hemmed edges are worth specifying. A raw edge at 0.35 mm cuts a glove and rusts first. A hem adds one pass and removes both problems. Camber is the most common cause of a rejected bundle, and it starts at the coil, so check the first 3 m of every new coil against a straight edge before touching a roll.

O Que Colocar na Consulta

Five numbers turn a false ceiling roll forming quotation into a buildable specification:

Strip thickness range and the coating class you actually buy
Module sizes, because slot pitch is fixed into the punch die
Which profiles the line must run, and how often it switches
Annual output in metres, which sets decoiler and accumulator size
Finished length tolerance your market enforces

A two profile false ceiling roll forming line for main tee and cross tee, with die cart and flying shear, is where most ceiling plants start. Adding wall angle and furring channel usually means a second smaller mill, because the thickness band and speed differ enough that one line serves neither well. Where profile count grows, the guia de linha multiprofile covers when a cassette change beats a second machine.

For the plasterboard side of the same ceiling, the Máquina perfiladora de canais para tetos page covers hat channel and furring profiles. If the pass structure is unfamiliar, Como funciona uma máquina de perfilagem de rolos explains it.

Buyers with a non-standard module should start from custom profile engineeringe coil selection goes deeper on grade and coating.

A Believe Industry fabrica linhas de perfilação sob medida desde 2005, com mais de 15 anos de experiência, mais de 80 engenheiros e mais de 500 projetos em mais de 50 países sob ISO 9001 e CE.

We size false ceiling roll forming lines against your module and coating class.

Perguntas frequentes

Q: What thickness does false ceiling roll forming run?

0.30 to 0.50 mm for the two tees, and 0.40 to 0.60 mm for wall angle and furring channel. Most plants settle on 0.40 mm main tee because it allows 1.5 m hanger spacing without sag.

Q: Can one false ceiling roll forming line make main tee and cross tee?

Yes, and most do. The rolls are one set, and only the punch die and cut length change. A die cart brings the switch to 20 to 40 minutes.

Q: How fast does a false ceiling roll forming line run?

45 to 60 m/min on cross tee and 35 to 50 m/min on main tee. A 5 t coil of 0.35 mm strip gives about 1,150 m, so coil changes set the shift rhythm more than speed does.

Q: Why do cross tee joints come loose on site?

Tab length is out of tolerance, usually from punch die wear rather than roll wear. A tab 0.15 mm short will not hold under load, and the symptom is a shadow line at the joint.

Q: Does false ceiling roll forming need a flying shear?

Yes. Above 40 m/min a stop and start cut leaves a mark on 0.35 mm strip that shows through paint, so a flying shear with a servo feed is the practical choice.

Q: What straightness do buyers normally accept?

0.5 mm per metre and under 1 degree of twist over the full length. Check coil camber before adjusting rolls, since camber left by the straightener cannot be corrected downstream.

Última atualização: 2026-11-05

Registro de alterações do artigo

2026-11-05: Initial publication, backfilled into the 2026-10-28 calendar slot.

Gatilhos da próxima revisão

EN 13964 or ASTM C635 revises ceiling load classes; a buyer requests a module below 500 mm; galvanized coating prices move the standard from Z100 to Z180.